Most people think they're good drivers, even bad ones (thanks, Dunning-Kruger!)

I'd like to see a rating and ranking system for drivers. A console in your car with a big red button-- when someone around you is driving recklessly, you target them and punch the red button... they rack up demerits (or frowny faces or whatever) and they can go to a site to see how they rank up, and how people think they drive.

Not that it's feasible or anything, but I'd love for somebody to do this; there are people in dire need of this service (myself possibly included).